A kind of organosilicon wetting aid and preparation method thereof

Abstract

The present invention relates to a kind of organosilicon wetting aid and preparation method thereof, and belongs to the technical field of wetting aid. The formula of the organosilicon wetting aid includes the following components, by weight percentage, 50-60 parts of deionization, 30-40 parts of polyether-modified polysiloxane, 10-20 parts of composite fillers, 5-10 parts of polyethylene glycol, and 3-5 parts of modified water-based acrylate. Among them, the composite filler first enhances the porosity of fumed silica by sodium hydroxide activation, and then glycerol and camellia oil are loaded on the surface and pores of fumed silica by physical adsorption, and finally the performance is further improved by 1-butyl-3-methylimidazole chloride; water-based acrylate is obtained by polyanionic cellulose modification. The organosilicon wetting aid prepared by the present invention only needs to be added in a small amount in water-based coatings to achieve excellent wetting properties, while improving the adhesion and durability of the coating.

Description

Technical Field

[0001] The invention belongs to the technical field of wetting aids and relates to an organosilicon wetting aid and a preparation method thereof. Background Art

[0002] In the current waterborne coating industry, polyether-modified siloxane surfactants are becoming the focus of attention due to their unique wettability, spreadability, and functional diversity brought by flexible structural design. However, traditional polyether-modified siloxane surfactants often face multiple challenges in performance. On the one hand, they need to maintain excellent wettability and good adhesion, and on the other hand, they need to take into account low surface tension and excellent recoatability, foam stability and hydrolysis stability. There are certain contradictions between these performance requirements, which limits the application of traditional products. Therefore, it is urgent to develop new silicone wetting additives. Summary of the invention

[0003] The object of the present invention is to provide an organosilicon wetting aid and a preparation method thereof, which have the characteristics of excellent wetting efficiency and small dosage.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A silicone wetting aid, the formula of the silicone wetting aid comprises the following components, in weight percentage, 50-60 parts of deionized water, 30-40 parts of polyether-modified polysiloxane, 10-20 parts of composite filler, 5-10 parts of polyethylene glycol, 3-5 parts of modified water-based acrylate,

[0006] The preparation method of the composite filler is as follows:

[0007] S1-1: 20-30 parts by weight of fumed silica was added to 70-80 parts by weight of sodium hydroxide solution, and ultrasonically stirred at 65-75°C for 1.5 h, washed with deionized water, dried in a vacuum drying oven at 60°C for 12 h, and then ball-milled in a ball mill for 30 min to obtain powder A;

[0008] S1-2: 6-8 parts by weight of Tween 20 were added to 60-80 parts by weight of deionized water, and ultrasonicated for 30 min, followed by dropwise addition of 3-5 parts by weight of propylene glycol and 1-2 parts by weight of camellia oil, and ultrasonic stirring was continued for 1 h, and powder A was added, and stirred at 70 °C for 2-3 h, and then dried in a vacuum drying oven at 60 °C for 24 h to obtain powder B;

[0009] S1-3: 5-10 parts by weight of powder B are added to 90-95 parts by weight of ethanol solution, ultrasonicated for 30 min, 10-20 parts by weight of 1-butyl-3-methylimidazolium chloride are added under stirring at 60°C, ultrasonicated for 1 h, and then rotary evaporated for 6-8 h to obtain the composite filler;

[0010] The preparation steps of the modified waterborne acrylate are as follows:

[0011] 1-3 parts by weight of polyanionic cellulose are added to 40-45 parts by weight of deionized water at 45°C, ultrasonicated for 30 minutes, 5-10 parts by weight of aqueous acrylate are added, and stirred at 60-80°C for 1-2 hours to obtain the modified aqueous acrylate.

[0012] Furthermore, the concentration of the sodium hydroxide solution in S1-1 is 1 M.

[0013] Furthermore, the ball milling speed in S1-1 is 200 r / min.

[0014] Furthermore, the mass fraction of the ethanol solution in S1-3 is 50%.

[0015] Furthermore, the rotary evaporation in S1-3 is performed at 50°C.

[0016] Furthermore, the polyethylene glycol is one or more of PEG200, PEG400, and PEG600.

[0017] A method for preparing an organosilicon wetting aid, the specific steps of the preparation method are as follows:

[0018] S8-1: Add polyether-modified polysiloxane and deionized water into the material tank according to the formula ratio and stir for 30 minutes;

[0019] S8-2: The composite filler, polyethylene glycol and modified water-based acrylate are sequentially added into a material tank and stirred for 30 minutes to obtain the organosilicon wetting aid.

[0020] Furthermore, the stirring speed in S8-1 is 500~600 r / min.

[0021] Furthermore, the stirring speed in S8-2 is 850~950 r / min.

[0022] Polyether-modified polysiloxane contains both hydrophilic polyether segments and hydrophobic polysiloxane segments in its molecular structure, and is a silicone surfactant with unique properties. Using polyether-modified polysiloxane as the main component of the wetting aid can significantly reduce the surface tension of the coating, making it easier for the coating to spread and wet on the substrate, thereby improving the leveling and coverage of the coating. At the same time, in the preparation and construction process of water-based coatings, the generation of foam is a common problem. Polyether-modified polysiloxane can not only effectively eliminate these foams, but also inhibit the generation of new foams, thereby ensuring the stability and construction performance of the coating. In addition, polyether-modified polysiloxane can improve the fluidity of water-based coatings, making it easier to spread and level on the substrate, helping to reduce or eliminate defects such as orange peel and brush marks on the coating surface, and improving the smoothness and aesthetics of the coating film.

[0023] Sodium hydroxide is used to activate fumed silica. Sodium hydroxide interacts with active groups such as silanol on the surface of fumed silica, which can remove impurities on the surface of fumed silica, such as residual organic matter and inorganic salts, and expose silicon atoms on the surface of fumed silica to increase its activity. In addition, sodium hydroxide can also etch fumed silica to form more micropores and mesopore structures, thereby increasing its specific surface area, which is beneficial to improving its adsorption performance and reactivity. The surface properties of fumed silica after sodium hydroxide activation change, making it easier to disperse evenly in solvents or polymers, thereby improving the performance of composite materials. Sodium hydroxide activation increases the number of silanols on the surface of fumed silica, which is beneficial to its application in water-based systems. In addition, the microporous structure in fumed silica provides storage space for the remaining components in the wetting aid, which helps to long-term performance of the wetting aid during the drying process of the coating. In water-based coatings, fumed silica activated by sodium hydroxide helps to form a more uniform and delicate coating system, further improving the flatness and glossiness of the coating.

[0024] Glycerol is hygroscopic. Through the hydrogen bond interaction between its hydroxyl group and water molecules, it can effectively reduce the surface tension of the aqueous system and further enhance the overall wetting performance of the wetting additive. Camellia oil is a natural plant oil. Its rich unsaturated fatty acid molecules have a special ability to oriented arrangement on the water interface and can form a tight monomolecular film. This film not only significantly reduces the surface tension of water, but also improves the stability of the system. In addition, the bioactive components in camellia oil, such as antioxidants, help improve the storage stability of the additive and prevent performance degradation caused by oxidation. Tween 20, as a non-ionic surfactant, has a dispersing and stabilizing effect, helping camellia oil and glycerol to form a stable emulsion in deionized water. Camellia oil and glycerol are loaded on the surface and micropores of activated silica by physical adsorption, which not only enhances the overall performance of the composite filler, but also further improves the wetting efficiency and stability of the wetting additive.

[0025] 1-Butyl-3-methylimidazolium chloride is an ionic liquid with a unique ionic structure and functional groups. It can interact with active groups such as hydroxyl groups on the surface of fumed silica, effectively reduce the surface energy of fumed silica, reduce its agglomeration tendency, and improve its dispersibility and stability in solvents. The compatibility between fumed silica and polymers is improved by the modification of 1-butyl-3-methylimidazolium chloride, which helps to enhance the dispersion stability and interfacial bonding of fumed silica in polymer substrates, thereby improving the overall performance of the coating. In addition, 1-butyl-3-methylimidazolium chloride will produce ionic effects in water or other solvents. These ions may interact with water molecules or other solvent molecules, thereby affecting the surface tension of the liquid. At the same time, the presence of chloride ions has a certain antibacterial effect, which helps to prevent the coating from being contaminated by bacteria. The ionic structure and functional groups of 1-butyl-3-methylimidazolium chloride may enable it to interact with the substrate, thereby helping to improve the bonding between the coating and the substrate and helping to improve the orderliness inside the coating.

[0026] Waterborne acrylates are film-forming and have good compatibility with a variety of waterborne resins, pigments and fillers, which enables waterborne acrylates to work synergistically with other ingredients in wetting aids to jointly improve the performance of the system. The polar groups on the molecular chains of polyanionic cellulose can form hydrogen bonds with water molecules. By reducing the surface tension between the waterborne coating and the substrate, polyanionic cellulose helps to achieve more efficient wetting performance. In addition, polyanionic cellulose can also improve the rheological properties of the wetting aid, giving it better fluidity and plasticity, helping to form a uniform coating during coating, spraying and other processes, and reducing the generation of bubbles and defects. The network structure and polar groups of polyanionic cellulose can interact with the molecular chains of waterborne acrylates, allowing the wetting aid to more effectively wet the substrate and form a firm coating, thereby further improving the adhesion and durability of the coating.

[0027] The addition of polyethylene glycol helps to further evenly disperse the wetting aid in the coating system and further improve the uniformity and stability of the coating. At the same time, polyethylene glycol has a lower surface tension, which can improve the interaction between the coating and the substrate, improve the wettability of the coating to the substrate, and help the coating to better penetrate the surface of the substrate and form a strong adhesion. In addition, polyethylene glycol can reduce the viscosity of water-based coatings, improve its fluidity, help the coating to be evenly mixed and spread during the preparation and construction process, and improve the construction efficiency and quality of the coating.

[0028] Beneficial effects of the present invention:

[0029] (1) Activate fumed silica with sodium hydroxide to effectively remove impurities, significantly increase the exposure and activity of silicon atoms, and improve its specific surface area and adsorption performance; use camellia oil and propylene glycol to load on the surface and internal microporous structure of activated fumed silica by physical adsorption, further improving the ability of the additive to reduce surface activity; use 1-butyl-3-methylimidazole chloride for modification to enhance dispersibility, stability and compatibility. At the same time, the ionic effect of 1-butyl-3-methylimidazole chloride helps to adjust the surface tension of the liquid. Composite fillers also help to form a more uniform and delicate coating system, improve the flatness and gloss of the coating, improve the bonding between the coating and the substrate, and improve the orderliness of the coating.

[0030] (2) Waterborne acrylates have synergistic effects in wetting additives due to their film-forming properties and good compatibility; polyanionic cellulose reduces surface tension through hydrogen bonds, improves wetting properties, improves rheological properties, and reduces coating defects. The interaction between waterborne acrylates and polyanionic cellulose helps to enhance wetting and coating firmness, improve adhesion and durability. As the main component of wetting additives, polyether-modified polysiloxane can significantly reduce the surface tension of the coating, improve leveling and coverage, effectively eliminate and inhibit foam, improve fluidity, and enhance smoothness and aesthetics. The addition of polyethylene glycol enhances dispersion uniformity, improves wettability and adhesion, reduces viscosity, and optimizes construction efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0032] Figure 1 The coating effect diagram is obtained by adding 0.1wt% of Example 1 and Comparative Example 1 into a waterborne polyurethane coating (the left diagram is the effect after adding Example 1 of the present invention, and the right diagram is the effect after adding Comparative Example 1);

[0033] Figure 2 The effect diagram of the coating after curing obtained by adding 0.3wt% of Example 1 and Comparative Example 1 to the waterborne polyurethane coating (the left figure shows the effect after curing by adding Example 1 of the present invention, and the right figure shows the effect after curing by adding Comparative Example 1);

[0034] Figure 3 This is the surface tension diagram of Example 1 after dilution at different times. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0036] In the embodiments of the present invention and the comparative examples:

[0037] Polyether modified polysiloxane: purchased from Shanghai Jiader Chemical Technology Co., Ltd., purity: 98%;

[0038] Fumed silica: purchased from Shanghai Baiyi Chemical Co., Ltd., purity: 99.99%;

[0039] Camellia oil: purchased from Jiangxi Baicao Pharmaceutical Co., Ltd., purity: 99.00%;

[0040] Tween 20: purchased from Guangdong Runhua Chemical Co., Ltd., CAS: 9005-64-5, purity: 99.99%;

[0041] Glycerol: purchased from Jiangsu Runfeng Synthetic Technology Co., Ltd. CAS: 56-81-5, purity: 99%;

[0042] 1-Butyl-3-methylimidazolium chloride: purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd., product number: PA10094;

[0043] PEG200, PEG400, and PEG600 were purchased from Jiangsu Runfeng Synthetic Technology Co., Ltd.;

[0044] Polyanionic cellulose: purchased from Shanghai Xige Biotechnology Co., Ltd., purity: 95%;

[0045] Water-based acrylate: purchased from Guangdong Xidun New Material Technology Co., Ltd., purity: 98%;

[0046] Ethanol: purchased from Shanghai MacLean Biochemical Technology Co., Ltd., CAS: 64-17-5, purity: 99%;

[0047] Sodium hydroxide: purchased from Shandong Zhongyuan Chemical Co., Ltd., CAS: 1310-73-2, purity: 99%;

[0048] Waterborne polyurethane coating: purchased from Xiamen Jintianran Environmental Protection Technology Co., Ltd., solid content: 50%.

[0049] Example 1

[0050] A silicone wetting aid, wherein the formula 1 of the silicone wetting aid comprises the following components, in weight percentage, 55 parts of deionized water, 35 parts of polyether-modified polysiloxane, 15 parts of composite filler, 8 parts of PEG400, 4 parts of modified water-based acrylate,

[0051] The preparation method of the composite filler is as follows:

[0052] S1-1: 25 parts by weight of fumed silica was added to 75 parts by weight of sodium hydroxide solution, and ultrasonically stirred at 70°C for 1.5 h, washed with deionized water, dried in a vacuum drying oven at 60°C for 12 h, and then ball-milled in a ball mill for 30 min to obtain powder A;

[0053] S1-2: 7 parts by weight of Tween 20 were added to 70 parts by weight of deionized water, and ultrasonicated for 30 min. Then, 4 parts by weight of glycerol and 1.5 parts by weight of camellia oil were added dropwise, and ultrasonic stirring was continued for 1 h. Powder A was added, and the mixture was stirred at 70 °C for 2.5 h. The mixture was then dried in a vacuum drying oven at 60 °C for 24 h to obtain powder B.

[0054] S1-3: 7 parts by weight of powder B were added to 93 parts by weight of ethanol solution, ultrasonicated for 30 min, 15 parts by weight of 1-butyl-3-methylimidazolium chloride were added under stirring at 60°C, ultrasonicated for 1 h, and then rotary evaporated for 7 h to obtain the composite filler.

[0055] The preparation steps of the modified waterborne acrylate are as follows:

[0056] 2 parts by weight of polyanionic cellulose were added to 43 parts by weight of deionized water at 45° C., ultrasonicated for 30 minutes, and 7 parts by weight of aqueous acrylate were added, stirred at 70° C. for 1.5 hours to obtain the modified aqueous acrylate.

[0057] A method for preparing an organosilicon wetting aid, the specific steps of the preparation method are as follows:

[0058] S8-1: Add polyether-modified polysiloxane and deionized water into the material tank according to the ratio of formula 1, and stir at a speed of 550 r / min for 30 min;

[0059] S8-2: The composite filler, PEG400 and modified waterborne acrylate were sequentially put into a material tank, and stirred at a speed of 900 r / min for 30 min to obtain the organosilicon wetting aid.

[0060] Example 2

[0061] A silicone wetting aid, wherein the formula 2 of the silicone wetting aid comprises the following components, in weight percentage, 50 parts of deionized water, 30 parts of polyether-modified polysiloxane, 10 parts of composite filler, 5 parts of PEG200, 3 parts of modified water-based acrylate,

[0062] The preparation method of the composite filler is as follows:

[0063] S1-1: 20 parts by weight of fumed silica was added to 80 parts by weight of sodium hydroxide solution, and ultrasonically stirred at 65°C for 1.5 h, washed with deionized water, dried in a vacuum drying oven at 60°C for 12 h, and then ball-milled in a ball mill for 30 min to obtain powder A;

[0064] S1-2: 6 parts by weight of Tween 20 were added to 60 parts by weight of deionized water, and ultrasonicated for 30 min. Then, 3 parts by weight of glycerol and 1 part by weight of camellia oil were added dropwise, and ultrasonic stirring was continued for 1 h. Powder A was added, and the mixture was stirred at 70 °C for 2 h. The mixture was then dried in a vacuum drying oven at 60 °C for 24 h to obtain powder B.

[0065] S1-3: 5 parts by weight of powder B were added to 95 parts by weight of ethanol solution, ultrasonicated for 30 min, 10 parts by weight of 1-butyl-3-methylimidazolium chloride were added under stirring at 60°C, ultrasonicated for 1 h, and then rotary evaporated for 6 h to obtain the composite filler.

[0066] The preparation steps of the modified waterborne acrylate are as follows:

[0067] 1 part by weight of polyanionic cellulose was added to 40 parts by weight of deionized water at 45° C., ultrasonicated for 30 minutes, and 5 parts by weight of aqueous acrylate was added, and stirred at 60° C. for 1 hour to obtain the modified aqueous acrylate.

[0068] A method for preparing an organosilicon wetting aid, the specific steps of the preparation method are as follows:

[0069] S8-1: Add polyether-modified polysiloxane and deionized water into the material tank according to the ratio of formula 2, and stir at a speed of 500 r / min for 30 min;

[0070] S8-2: The composite filler, PEG200 and modified waterborne acrylate were sequentially put into a material tank, and stirred at a speed of 850 r / min for 30 min to obtain the organosilicon wetting aid.

[0071] Example 3

[0072] A silicone wetting aid, wherein the formula 3 of the silicone wetting aid comprises the following components, in weight percentage, 60 parts of deionized water, 40 parts of polyether-modified polysiloxane, 20 parts of composite filler, 10 parts of PEG600, 5 parts of modified water-based acrylate,

[0073] The preparation method of the composite filler is as follows:

[0074] S1-1: 30 parts by weight of fumed silica was added to 70 parts by weight of sodium hydroxide solution, and ultrasonically stirred at 75°C for 1.5 h, washed with deionized water, dried in a vacuum drying oven at 60°C for 12 h, and then ball-milled in a ball mill for 30 min to obtain powder A;

[0075] S1-2: 8 parts by weight of Tween 20 were added to 80 parts by weight of deionized water, and ultrasonicated for 30 min, followed by dropping 5 parts by weight of glycerol and 2 parts by weight of camellia oil, and ultrasonically stirred for 1 h, and powder A was added, stirred at 70 °C for 3 h, and then dried in a vacuum drying oven at 60 °C for 24 h to obtain powder B;

[0076] S1-3: 10 parts by weight of powder B were added to 90 parts by weight of ethanol solution, and ultrasonicated for 30 min. 20 parts by weight of 1-butyl-3-methylimidazolium chloride were added under stirring at 60° C., and ultrasonicated for 1 h, followed by rotary evaporation for 8 h to obtain the composite filler.

[0077] The preparation steps of the modified waterborne acrylate are as follows:

[0078] 3 parts by weight of polyanionic cellulose were added to 45 parts by weight of deionized water at 45° C., ultrasonicated for 30 min, and 10 parts by weight of aqueous acrylate were added, stirred at 80° C. for 2 h to obtain the modified aqueous acrylate.

[0079] A method for preparing an organosilicon wetting aid, the specific steps of the preparation method are as follows:

[0080] S8-1: Add polyether-modified polysiloxane and deionized water into the material tank according to the ratio of formula 3, and stir at a speed of 600 r / min for 30 min;

[0081] S8-2: The composite filler, PEG600 and modified waterborne acrylate were sequentially put into a material tank, and stirred at a speed of 950 r / min for 30 min to obtain the organosilicon wetting aid.

[0082] Comparative Example 1

[0083] A commercially available organosilicon wetting agent was used as a comparison, purchased from Foshan Qianyou Chemical Co., Ltd., with the product number AKN-1045.

[0084] Comparative Example 2

[0085] In the preparation of the composite filler, step S1-2 is not performed, and the remaining steps are consistent with those in Example 1.

[0086] Comparative Example 3

[0087] In the preparation of the composite filler, steps S1-3 are not performed, and the remaining steps are consistent with those in Example 1.

[0088] Comparative Example 4

[0089] The water-based acrylate was not modified, and the remaining steps were consistent with those in Example 1.

[0090] Performance test: The surface tension of the wetting aids prepared in the examples and comparative examples was measured according to GB / T 22237-2008 standard. The mass fraction of the measured sample was 0.1%, and the diluent was deionized water.

[0091] The experimental data are summarized in the following table:

[0092]

[0093] It can be seen from the data of the examples and comparative examples that the organosilicon wetting aid prepared in the present invention has excellent wetting properties and only needs to be added in a small amount to achieve a good effect.

[0094] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A silicone wetting aid, characterized in that: The formula of the organosilicon wetting aid includes the following components, by weight percentage, 50-60 parts of deionized water, 30-40 parts of polyether-modified polysiloxane, 10-20 parts of composite filler, 5-10 parts of polyethylene glycol, 3-5 parts of modified water-based acrylate, The preparation method of the composite filler is as follows: S1-1: 20-30 parts by weight of fumed silica was added to 70-80 parts by weight of sodium hydroxide solution, and ultrasonically stirred at 65-75 °C for 1.5 h, washed with deionized water, dried in a vacuum drying oven at 60 °C for 12 h, and then ball-milled in a ball mill for 30 min to obtain powder A; S1-2: 6-8 parts by weight of Tween 20 were added to 60-80 parts by weight of deionized water, and ultrasonicated for 30 min, followed by dropwise addition of 3-5 parts by weight of propylene glycol and 1-2 parts by weight of camellia oil, and ultrasonic stirring was continued for 1 h, and powder A was added, and stirred at 70 °C for 2-3 h, and then dried in a vacuum drying oven at 60 °C for 24 h to obtain powder B; S1-3: 5-10 parts by weight of powder B are added to 90-95 parts by weight of ethanol solution, ultrasonicated for 30 min, 10-20 parts by weight of 1-butyl-3-methylimidazolium chloride are added under stirring at 60°C, ultrasonicated for 1 h, and then rotary evaporated for 6-8 h to obtain the composite filler; The preparation steps of the modified waterborne acrylate are as follows: 1-3 parts by weight of polyanionic cellulose are added to 40-45 parts by weight of deionized water at 45°C, ultrasonicated for 30 minutes, 5-10 parts by weight of aqueous acrylate are added, and stirred at 60-80°C for 1-2 hours to obtain the modified aqueous acrylate.

2. The organosilicon wetting aid according to claim 1, characterized in that: The concentration of the sodium hydroxide solution in S1-1 is 1 M.

3. The organosilicon wetting aid according to claim 1, characterized in that: The ball milling speed in S1-1 is 200 r / min.

4. The organosilicon wetting aid according to claim 1, characterized in that: The mass fraction of the ethanol solution in S1-3 is 50%.

5. The organosilicon wetting aid according to claim 1, characterized in that: The rotary evaporation in S1-3 was performed at 50°C.

6. The organosilicon wetting aid according to claim 1, characterized in that: The polyethylene glycol is one or more of PEG200, PEG400 and PEG600.

7. A method for preparing the organosilicon wetting aid according to any one of claims 1 to 6, characterized in that: The specific steps of the preparation method are as follows: S7-1: Add polyether-modified polysiloxane and deionized water into the material tank according to the formula ratio and stir for 30 minutes; S7-2: The composite filler, polyethylene glycol and modified water-based acrylate are sequentially added into a material tank and stirred for 30 minutes to obtain the organosilicon wetting aid.

8. The method for preparing an organosilicon wetting aid according to claim 7, characterized in that: The stirring speed in S7-1 is 500-600 r / min.

9. The method for preparing an organosilicon wetting aid according to claim 7, characterized in that: The stirring speed in S7-2 is 850-950 r / min.

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